Relay



Dec. 18 1923. 1,478,045

E. D. MEAD RELAY Filed NOV. 19 1920 I llll Wye/Var: Ear Ward 01 4904 Patented Dec. 18. 1923.

(UNITED STATES PATENT OFFICE.

EDWARD HEAD, OF CALDWELL,

NEW JERSEY, ASSIGNOB '10 wmmm ELECTRIC COIPANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK,

RELAY.

Application filed Iovember 19, 1820. Serial llo; 425,100.

To all whom it ma concern."

Be it known t at I, EDWARD D. MEAD, a citizen of the United States of America, residing at Caldwell in the county of Essex and State of New Jersey, have invented cer- Ullll new and useful Improvements in Relays, of which the following is a full, clear, concise, and exact description.

This invention relates to relays.

An object of the invention is to provide a relay of compact and rug (1 construction and which may be adjuste so that it will reliably follow very rapid pulses of current.

Another object is to provide a relay having adjustments which permit the operatin characteristics and particularly the spec of pick-up and release of the armature to be widely varied.

In accordance with the above and other objects of the invention, the relay is constructed with a high permeability U-shaped core having two adjacent pole pieces, each of which is arranged to exert a tractive force on a light armature. The core is excited by an operating winding that is adapted to produce a number of ampere turns which is large in comparison to the cross section of the core Associated with the armature are a chatterless contact number, a retractile spring and an adjustable support which is arranged so that the air gaps can be. varied.

An important use of relays constructed in accordance with this invention is in connection with automatic and semi-automatic telephone systems where it has been found necessary to provide means for opening and closing circuits with great rapid1ty. A particular application of this relay'may be in a trunk circuit that has been associated with a subscribers line by means of line finder,

apparatus, this relay being used to follow the current pulses from a subscribers dial and operate circuit contacts controlling selector apparatus to complete the talking circuits desired by the subscriber.

Referring to the illustrative drawingls,

Flg. 1 represents a perspective view of t e relay in released position. Fig. 2 represents an alternate method of mounting the armature that maybe desirable under certain conditions.

In Fig. 1 is disclosed a relay comprising an energizing coil 1, a U-shaped magnet core 3, said coil being wound on one leg of this core, and said core having a bent-over portion or car forming a magnetic pole 4 on its unwound portion in such a position as to bring the face of the ear in the same plane as the face of the other pole of the magnet structure,- Co-operating with both pole pieces and adjacent thereto on the side is an armature 5 adjustably supported by support member 6 which is heldbetween the before mentioned bent pole and a non-magnetic bridge? and is held in proper alignment by guide screw 8 in slot 9 of the armature connector 6. In this Fig. 1 the armature is hinge supported in the connector 6 on a pin' 10 held 1n said connector and connected to the armature by gripping piece '11 which is rigidly fastened on the armature. A retractile spring 12 of flat U-shape is screw retained on the armature 5, and so mounted as to bring the body of the spring opposite a hole or perforation 13 in the armature. A bent flat spring contact carrying member 14 is mounted on the armature intermediate the prongs of retractile spring 12, and carries at its outer end a contact 15. This contact carrying member is su ported in the proper position by a centrally located lug or car 16 on the free end of the armature, bent toward the magnet core. Cooperating with said movable contact are adjustable fixed contacts 18 mounted in screws threaded into retaining and current carrying members 20 extending from the front of the relay to the rear, said members 20 serving also to securely maintain the contacts 18 1n proper position. A spring adjusting screw 17, cooperating with nonmagnetic bridge 7 passes through the hole 13 in the armature 5 and comes in contact with the retractile spring 12 in such a position as to adjust the stress in this spring, and thereby adjusts the operating characteristics of the relay. Adjustment in position of armature connector 6 will obviously give another method of controlling the operating characteristics of the relay. This adjustment particularly affects the speed of pickup and release of the armature In Fig. 2 is disclosed the same general features of the mechanism as in Fig. 1 with the exception of the means for adjustably supporting the armature. This alternate means consists of a flat metallic nonmagnetic med 20 fixedly attached to the armature and adjustably attached to the ole iece in the same manner as described in tea Fig. 1. Reed 20 is preferably made of thin sheet phosphor-bronze and introduces a minor sprin action in the armature'system. What is c aimed is: 1.- In aneIectromagneticrelay, the combination of an energizing coil, a U-shaped core of magnetic material havin a plane ole face onone member an a pole ace formed by a rectangularly extending ear on the other magnet arm in the same plane, an armature cooperating with said core, a support for said armature outside the direct magnetic field of either pole of said core, the common lane of both pole faces being substantial y paralleljto the plane of said armature, a resilient contact member on said armature, a contact point therein, adjustable contact points cooperating therewith and current carrying members for said adjustable contact points.

7 2. In an electromagnetic relay, the combination of an energizing coil, a U-shaped ma netic core, an armature short in length, and light in weight therefor, an adjustable connector of nonmagnetic material for supporting said armature from one pole of said core in a position adjacent to both core poles, a contact member thereon, adjustable contact points cooperating therewith and current carrying members for said adjustable contact oints.

3. In an e ectromagnetic relay, the combination of an energizing coil, a U-shaped magnetic core, a short and light armature supported by a reed spring which is adjustable in a plane substantially perpendicular to the armature, a resilient contact member on said armature, a contact point therein, adjustable contact points cooperating therewith and current carrying members for said adjustable contact points 4. In an electromagnetic relay, the combination of an energizing coil, a U-shaped magnetic core, a short and light armature adjustably supported from one ole of said core by a reed which is adjustab e in a plane substantially perpendicular to the armature,

a, resilient contact member on said armature, a contact point therein, adjustable contact points cooperating therewith and current carrying members for said adjustable contact points.

5.; In an electromagnetic relay, the comblnation of an energizing coil, a U-shaped magnetic core, an armature adjacent one side of both poles of V said core and adjustably supported from one of said poles, said armas ture having a flat 'U-shaped spring attached to its outer face and a. hole opposite the i body of said U-shaped spring, a bent flat spring contact member on said armature intermediate the prongs of said U-shaped armature spring, said armature having a central car on its free end bent toward the core for support of said contact member,

adjustable contact points and current carrying members'therefor.

6. In an electromagnetic relay, the combination of an energizing coil, a U-shaped' core therefor, a perforated armature on one side thereof carrying a fiat U-shaped retractile spring opposite the perforation in said armature, and a, bent contact member attached intermediate the rongs of said spring, a non-magnetic bri ge joining the core poles on the opposite side from said armature, an adjusting screw threaded through said bridge in line with and extending through said perforation in said armature and making contact with said U-shaped retractile spring in such manner as to thereby adjust the stress therein, adjustable contact points and current carrying members therefor.

In witness whereof, I hereunto subscribe my name this 17th day of November A. 1)., 

